3.3V-Powered, 10Mbps and Slew-Rate-Limited

True RS-485/RS-422 Transceivers

6

_______________________________________________________________________________________

0.8

0.7

0.9

1.0

1.1

1.2

-40

-20

0

20

40

60

100

80

SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

X = DON’T CARE

DE = 0, RE = 0

_____________________________Typical Operating Characteristics (continued)

0

10

20

30

40

50

60

70

80

100

90

-40

-20

0

20

40

60

100

80

SHUTDOWN CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

______________________________________________________________Pin Description

—

—

3

4

5

6

—

8

—

7

1

—

MAX3483/

MAX3485/

MAX3486

2

1

2

3

4

5

—

—

6

—

7

—

8

—

2

Receiver Output. If A > B by 200mV, RO will be high; if A < B by 200mV,

RO will be low.

3

Receiver Output Enable. RO is enabled when RE is low; RO is high imped-

ance when RE is high. If RE is high and DE is low, the device will enter a

low-power shutdown mode.

4

Driver Output Enable. The driver outputs are enabled by bringing DE high.

They are high impedance when DE is low. If RE is high and DE is low, the

device will enter a low-power shutdown mode. If the driver outputs are

enabled, the parts function as line drivers. While they are high impedance,

they function as line receivers if RE is low.

5

Driver Input. A low on DI forces output Y low and output Z high. Similarly, a

high on DI forces output Y high and output Z low.

6, 7

Ground

9

Noninverting Driver Output

10

Inverting Driver Output

—

Noninverting Receiver Input and Noninverting Driver Output

12

Noninverting Receiver Input

RO

–

RE

DE

DI

GND

Y

Z

A

A

—

B

Inverting Receiver Input and Inverting Driver Output

11

B

Inverting Receiver Input

13, 14

Positive Supply: 3.0V

1, 8

N.C.

No Connect—not internally connected

MAX3488/

MAX3490

PIN

FUNCTION

MAX3491

FUNCTION

NAME

NAME